Testing the efficiency...

Senast ändrad: 12 december 2017

Testing the efficiency of uneven aged forestry as a conservation tool to promote biodiversity and ecological legacies

Aim: Compare uneven-aged to even-aged forest management in order to evaluate whether uneven aged forestry can be used as a conservation tool to increase or maintain biodiversity.

Project description: Today there is ample evidence that even-aged forest management (i.e. clear-felling) has negative effects on biodiversity. Historically, different forms of uneven-aged forest management (dimension cutting, selection cutting etc.) have been used in Fennoscandia. However, these methods were abandoned mainly due to low productivity and the development of mechanized forest harvesters. In recent years there has been renewed interest in uneven-aged forestry, which is assumed more favourable for biodiversity than even-aged management systems.  However, studies considering the effects of uneven-aged management on biodiversity are limited. The aim of this project is to test whether uneven aged forestry can be used as a conservation tool to increase or maintain biodiversity. We have a large scale field study set up in boreal spruce forest of central Sweden. We included five different treatments; selective felling, recent clear-felling, older clear-felling and recent thinning, reference stand (unmanaged production forest) and woodland key habitats (old growth forest).  We will collect beetles in all the stand types and study how species richness, abundance and assemblage differ between treatments in order to evaluated selective felling as an alternative management method. The project is conducted in close collaboration with international researchers, the Swedish Forest Agency and with major Swedish forestry companies.

Funding: Formas and Lammska stiftelsen.

Project leader:
Joakim Hjältén

Associated researchers:
Therese Löfroth
Timothy Work
Jean-Michel Roberge
Klara Joelsson

Sidansvarig: bo-soren.wiklund@slu.se